egg cell definition
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EGG CELL Definitions of egg cell. 1. animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds. mature ovum after penetration by sperm but before the formation of a zygote. a small or immature ovum.
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Gametogenesis/fertilization The male and female reproductive cells (gametes = sex cells) develop from the meiocytes through post-meiotic differentiation in both animals and plants. The male sex cells are called sperm cells (from the Greek sperma = seed), the female are named egg cell or ovum (the latin word for egg).
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What Is the Size of a Human Egg Cell? Quick Answer. A human egg cell is about .1 millimeters, or .004 inches, in diameter. It is one of the largest cells in the human body and is just barely big enough to be seen without the aid of a microscope. Continue Reading.
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Structure of the Egg When the egg is freshly laid, the shell is completely filled. The air cell is formed by contraction of the contents during cooling and by the loss of moisture. A high-quality egg has only a small air cell. The yolk is well-centered in the albumen and is surrounded by the vitelline membrane, which is colorless.he egg is a biological structure intended by nature for reproduction. It protects and provides a complete diet for the developing embryo, and serves as the principal source of food for the first few days of the chick's life.
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Germ cell Germ cell. A germ cell is any biological cell that gives rise to the gametes of an organism that reproduces sexually. In many animals, the germ cells originate in the primitive streak and migrate via the gut of an embryo to the developing gonads. There, they undergo meiosis, followed by cellular differentiation into mature gametes, either eggs or sperm.
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egg The mature reproductive cell of female animals. The nucleus of an egg is capable of fusing with the nucleus of a sperm (the male reproductive cell) to form a new organism. In many species, eggs are produced by the ovaries. An egg carries half as many chromosomes as the other cells of the body. Also called ovum.
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Gamete Definition. noun, plural: gametes. (1) A reproductive cell or sex cell that contains the haploid set of chromosomes, e.g. spermatozoon or sperm cell (male reproductive cell) and egg cell or ovum (female reproductive cell).
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cell (sĕl) n. 1. A narrow confining room, as in a prison or convent. 2. A small enclosed cavity or space, such as a compartment in a honeycomb or within a plant ovary or an area bordered by veins in an insect's wing.
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Gonad Ovary, in zoology, female reproductive organ in which sex cells (eggs, or ova) are produced. The usually paired ovaries of female vertebrates produce both the sex cells and the hormones necessary for reproduction.
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Zygote: Definition & Explanation Definition of a Zygote. Male sex cells are called sperm and female sex cells are called eggs. In order for reproduction to occur and new individuals to form, a sperm cell must unite with an egg cell.
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What Are the Functions of the Cytoplasm in the Egg Cell of Humans? What the Egg Needs. Sexual reproduction is the joining of two cells -- each from a different parent organism -- to create a new cell that can grow into a child organism. The child organism gets part of its DNA from each parent, resulting in a new combination of DNA that will control the development of the child.
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Egg cell In algae, the egg cell is often called oosphere. Drosophila oocytes develop in individual egg chambers that are supported by nurse cells and surrounded by somatic follicle cells. The nurse cells are large polyploid cells that synthesize and transfer RNA, proteins and organelles to the oocytes.
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- o·o·cyte. n. A diploid cell from which an egg or ovum develops by meiosis. A primary oocyte divides to produce a polar body and a secondary oocyte, which divides again to produce the ovum and another polar body.(ˈəʊəˌsaɪt).·o·cyte. n. A diploid cell from which an egg or ovum develops by meiosis. A primary oocyte divides to produce a polar body and a secondary oocyte, which divides again to produce the ovum and another polar body.
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Egg An egg is an animal reproductive body that is spherical or ellipsoidal in shape. Inside the egg is the fertilized ovum that grows and develops as an embryo. It is produced and released outside of the animal body by fish, birds, snakes, insects, turtles, and other animals. A bird's egg, for instance, is typically comprised of the following parts: (1) shell, (2) thin, proteinaceous membranes, (3) air cell, (4) albumen, (5) chalazae, (6) vitelline membrane, (7) yolk, and (8) zygote.
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ovum ovum. pl. ova [L.] egg; the female reproductive or germ cell which, after fertilization, is capable of developing into a new member of the same species; sometimes applied to any stage of the fertilized germ cell during cleavage and even until hatching or birth of the new animal. centrolecithal ovum.
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Egg Cell The Egg Cell consists mainly of 4 features - Nucleus, Cytoplasm, Corona Radiata, Zona Pellucida. The Egg Cell's size has increased to make it easier in the development of the embryo within it. What an egg cell looks like.
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- Oocyte: A female germ cell in the process of development. The oocyte is produced in the ovary by an ancestral cell called an oogonium and gives rise to the ovum (the egg), which can be fertilized.ocyte: A female germ cell in the process of development. The oocyte is produced in the ovary by an ancestral cell called an oogonium and gives rise to the ovum (the egg), which can be fertilized.
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- In fact, eggs are the largest cells known in the animal kingdom. They range in size from tiny ones produced by hummingbirds (0.006 oz, or 0.2 gram), to nearly twenty pounds (9 kg), laid by the Elephantbird of Madagascar, which is now extinct, but was known by primitive humans.
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- Thus, cell-division cycle is an essential process by which a single-cell fertilized egg develops into a mature organism and the process by which hair, skin, blood cells, and some internal organs are formed.
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Difference Between Ovum and Egg Egg is the fertilised state of an ovum with the genetic materials of a male gamete. In fact, an egg could be defined as the organic vessel that facilitates the embryonic development for a zygote. For an ovum to become an egg, the transfer of the genetic material should have to take place.
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- gonad (gō´nad), n an ovary or testis, the site of origin of eggs or spermatozoa. a sex gland; a gamete-producing gland; the ovary in the female and the testis in the male. The ovary produces the ovum and the testis produces the spermatozoon.
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Egg cell In animals, egg cells are also known as ova (singular ovum, from the Latin word ovum meaning egg or egg cell). The term ovule is used for the young ovum of an animal.ee egg for a discussion of eggs of oviparous animals. The egg cell's cytoplasm and mitochondria are the sole means the egg is able to reproduce by mitosis and eventually form a blastocyst after fertilization.
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What are the reproductive organs that produce sperm? Egg? ovum egg - animal reproductive body consisting of an ovum or embryo together with nutritive and protective envelopes; especially the thin-shelled reproductive body laid by e.g. female birds gamete - a mature sexual reproductive cell having a single set of unpaired chromosomes ootid - mature ovum after penetration by sperm but before the formation of ...
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Difference Between Egg and Sperm Cell Formation 1 The most obvious difference: a sperm cell is a reproductive cell of males while egg cells are of females. 2  Both egg cells and sperm cells depend on each other for the reproduction of a human life. 3  Both egg cells and sperm cells undergo meiosis.n the process of sperm cell formation, a motile spermatozoa is produced. While in egg cell formation, an ovum in spherical in shape and immobile. It is produced and is bigger in size than the sperm cell. There is also a difference on how these cells are produced and it involves hormones.
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- Ovules contain egg cells. After a sperm cell moves down the style of a carpel, it will enter the ovule and fuse with an egg cell. This is called fertilization. It produces an embryo, or baby plant. A protective covering surrounds this embryo and its food source.
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- Somatic cell. A somatic cell is generally taken to mean any cell forming the body of an organism. Somatic cells, by definition, are not germline cells. In mammals, germline cells are the sperm and ova (also known as gametes) which fuse during fertilization to produce a cell called a zygote, from which the entire mammalian embryo develops.